Not much, but I make time. I have found nobody cares about my stuff like I do. Its rare I turn stuff over to paid folks, but I do on occasion. I can handle the computers, because really, its rare the solid state stuff goes bad, its usually sensors or other moving parts.
The makers, and of course the dealerships would like you to think they are no maint, but its an drivetrain, and brakes, and suspension, just like always. Spark plugs last 100K, but are still plugs. My steering system has a an angle sensor, but a tie rod is still a tie rod. My transmission is an electronically controlled semi-auto five speed, but changing its fluid is the same as a Ford C6. Easier even, since its only six bolts and a reusable rubber gasket.
I have a Bluetooth adapter that lets my phone see all the OBDII data real time, and it makes it easy to see whats up. The electronics, they help you pin stuff down.
Oh, and my brakes? Easiest ever. Dont need to unbolt the calipers to change pads. Two pins pushed out, pads slip out, new ones in, five minutes tops.